#include<stdio.h>

int main(int argc, char *argv[])
{
  FILE *fp;
  off_t sfseek;
  fp = fopen("t.txt","r");
  if(fseek(fp,0L,SEEK_END)<0)
    {
      printf("xxx");
      exit(1);
    }
  sfseek = ftell(fp);
  return 0;
}
